Hey have s☺☺☺e..x c☺h☺☺☺a☺t any one? ✨❤​

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

there is none because earth is stationary and flat.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).